Metalliferous mono azo dyestuffs



United States Patent Ofice 3,417,074 Patented Dec. 17, 1968 3,417,074 METALLIFEROUS MONO AZO DYESTUFFS Rudolf Kiihne and Fritz Meininger, Frankfurt am Main, Walter Noll, Bad Soden, Taunus, and Helmut Rinno and Siegfried Schiessler, Frankfurt am Main, Germany, assignors to Farbwerke Hoechst Akfiengesellschaft vorrnals Meister Lucius & Bruning, Frankfurt am Main, Germany, a corporation of Germany No Drawing. Continuation-impart of application Ser. No. 219,137, Aug. 24, 1962. This application May 4, 1965, Ser. No. 453,201 Claims priority, application Germany, Aug. 26, 1961,

34,783 6 Claims. (Cl. 260151) ABSTRACT OF THE DISCLOSURE Fibre-reactive copper, cobalt, nickel and chromium monoazoand disazo dyestuffs containing, as reactive moieties, one grouping of the formula wherein R is alkyl of 1 to carbon atoms or cyclohexyl, and R is hydrogen or alkyl of 1 to 5 carbon atoms, said dyestuffs being suitable for the dyeing or printing of textile fibrous materials consisting of cellulose, wool, silk or polya-mides.

This application is a continuation-in-part of our application Ser. No. 219,137 filed Aug. 24, 1962, now abandoned.

The present invention relates to metalliferous azo-dyestuffs and to a process for preparing them; more particularly it relates to complex metal compounds of azo-dyestuffs having the general formula rt F\NSO2CH=CHRz) in which F represents the radical of an azo-dyestutf molecule containing a grouping capable of forming metal complexes and at least one group imparting solubility in water, R represents an aliphatic or cycloaliphatic hydrocarbon radical, and R represents hydrogen or an aliphatic hydrocarbonradical, and n stands for an integer.

Especially, the present invention relates to copper, cobalt, nickel or chromium compounds of azo-dyestuffs having the formula R1 (I111 (RgCl-I=CHO2 S1 I n-1 X NSOzCH=CH-R2 .H

DN=NK Hrn-l I'Im-i wherein R represents cyclohexyl or alkyl having 1 to 5 carbon atoms; R represents hydrogen or alkyl having 1 to 5 carbon atoms; n and m are each an integer from 1 to 2 inclusive, the sum of n+m being 3 and at least one grouping R1 l Iso -oH=oHR being present in the dyestuif molecule; D represents a radical of benzene, benzene sulfonic acids, lower alkoxy benzenes, chlorobenzene sulfonic acids, acetylamino benzene sulfonic acids, nitrobenzene sulfonic acids, or naphthalene sulfonic acids; X, which is bonded to an aromatic nucleus of D in a position adjacent to the azo group, represents hydroxyl, lower alkoxy or carboxyl; and K represents the radical of a coupling component of the group consisting of I (a) l-phenyl-S-pyrazolones substituted in the 3-pos1- tion by CH or COOH,

(b) 1-phenyl-3-methyl-5-pyrazolones substituted on the phenyl group by Cl, -CH or SO H,

(c) naphthalene sulfonic acids substituted by hydroxyl, amino, acetylamino, benzoylarnino, methyl-amino or carboxyphenylamino groups,

(d) aminobenzenes substituted by amino, hydroxyl or SO H,

(e) an acetoacetylaminobenzene sulfonic acid,

(f) phenylazo naphthalenes substituted on the naphthalene nucleus by hydroxyl or sulfonic acid groups,

(g) phenylazo-hydroxyaminonaphthalenes substituted on the phenyl nucleus by hydroxyl or sulfonic acid groups,

(h) hydroxyazobenzene sulfonic acid, and

(i) 3 aminophenyl 5 (1 amino 8 hydroxyl 3, 6-disulfonaphthalene)-triazines substituted in the 1-position of the triazine ring by C1 or OCH the molar ratio between the meal and azo-dyestuff being 1:1 for copper, cobalt, nickel, and chromium, and 1:2 for cobalt and chromium, and said compound containing at least one sulfonic acid or ca-rboxylic acid group.

We have found that novel valuable complex metal compounds of azo-dyestuffs are obtained by reacting azodyestulfs containing a grouping which is able to form a metal complex and at least one group imparting solubility in water and once or several times the group I l-SO2CH=CHR2 in which R represents an aliphatic or cycloaliphatic hydrocarbon radical and R represents hydrogen or an aliphatic hydrocarbon radical with agents yielding metal.

As groups imparting solubility in water there are especially used carboxylic acid or sulfonic acid groups. These groups may be distributed optionally in the dyestuff molecule, for example in such a maner that only one component used for the preparation of dyestulf or both components contain at least one carboxylic acid or sulfonic acid group.

As starting materials there are suitable on principle all azo compounds which are able to form complex metal dyestuffs as fars as they contain once or several times the vinylsulfonylamino group of the above formula, for eX- ample o.o-dihydroxyazodyestuffs, o-hydroxy-o-aminoazodyestuffs, o-amino-o-carboxyazo-dyestutfs, o-hydroxy-o'- carboxyazo-dyestuffs as well as o-hydroxy-o'-alkoxy-azodyestuffs or o-hydroxy-o-(o-carboxymethoxy)-azo dyestuffs which, with the formation of metal complexes, change to o.o'-dihydroxyazo-dyestuffs and o-hydroxyazodyestuffs which with the oxidizing metallization change to o.o'-dihydroxyazo-dyestuffs.

As starting materials there may also be used azo-dyestuffs containing once or several times the group in which R and R have the meanings described above. These dyestuffs are converted at room temperature or at an elevated temperature into dyestuffs containing the vinylsulfonylamino group by treating with agents having an alkaline reaction. The alkali treatment can be carried out before, during or after the formation of the complex metal dyestuffs.

The starting materials free from metal can be prepared according to known methods by coupling for example o-hydroxy or o-carboxy diazo compounds of the benzene or naphthalene series with coupling components coupling in a position adjacent to a hydroxy group or to an enolizable keto group or in a position adjacent to an amino group. The choice of the diazo and coupling components used for the formation of dyestulf should be made in such a manner that the finished dyestuff contains at least one substituent of the above-mentoined formula and addi- 3 tionally at least one acid group imparting solubility in water.

The o.o'-dihydrazo-dyestutfs mentioned as starting materials can also be prepared indirectly by coppering the corresponding o-hydroxy-o-alkoxyazo-dyestuffs to become dealkylated or by treating o-hydroxyazo-dyestutfs containing one of the above-mentioned ethionylamino groups and in addition thereto a free o-position in a weakly acid solution with copper salts and an oxidizing agent. The complex compounds so obtained can, subsequently, be decoppered, for example, by treating with strong mineral acid or hydrogen sulfide and converted into the o.o-dihydroxyazodyestuffs desired According to the process of the present invention the azo-dyestuffs of the formula mentioned above used as starting materials are reacted with an agent yielding metal. The reaction of the agent yielding metal with the starting materials can also be effected with dyestuffs as they are included in the coupling mixture.

As agents yielding metal there are used, for example, salts of manganese, iron, aluminum, especially, however, salts of cobalt, chromium, copper and nickel such as chromium sulfate, cobalt acetate, cobalt sulfate, copper acetate or copper sulfate. There may also be used agents yielding metal which contain the metal bound in a complex form, for example, complex chromium compounds of organic hydroxycarboxylic acids such as, for example, salicyclic acid, or complex cobalt or copper compounds of the alkali metal salts of aliphatic hydroxycarboxylic acids such as lactic acid and especially tartaric acid, for example sodium copper tartrate.

The reaction of the starting deystuffs with the agents yielding metal can be effected, for example, in such a manner that the aqueous preparation mixture is heated in a weakly acid, neutral or alkaline medium to temperatures between 20 and 130 C., if desired under reflux or in a closed vessel. If. necessary, there may also be added organic solvents, such as tetrahydrofurane or dioxane.

In the complex metal dyestuffs obtained according to the present invention the molar ratio of metalzmonoazo dyestuff is 1:1 when the metals are copper or nickel, and 1:1 or 1:2 when the metals are cobalt or chromium. In the form of their alkali metal salts the complex metal dyestuffs obtainable according to the invention are readily soluble in water. They are suitable for dyeing and printing various materials such as wool or polyamide fibers, advantageously, however, textile materials containing cellulose such as regenerated cellulose, linen, cellulose or especially cotton. The novel dyestuffs are suitable for dye ing materials containing cellulose according to the direct dyeing method, the padding-steaming process or the printing process. With the aid of acid-binding agents the dyestuffs are fixed on the textile materials to be dye, if desired in the hot. This process can be carried out in such a manner that the dyed textile material is after-treated with an acid-binding agent or that the acid-binding agent is caused to act upon the textile material before or during the treatment with the dyestufi. The dyeings and prints obtained with the novel azo-dyestuffs are distinguished by a high tinctorial strength, a good to very fasteness to light and outstanding properties of wet fastness particularly against vigorous washing. The novel dyestuffs of the present invention containing the group alkyl are, in particular, superior to dyestuffs of similar structure which contain the group with regard to the color strength, the brillancy of tint and the stability to weak alkali of the cotton dyeings.

The following examples serve to illustrate the invention but they are not intended to limit it thereto, the parts and percentages being by weight unless otherwise stated and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter.

EXAMPLE 1 228 parts of 1-hydroxy-2-amino-4-N-methyl-Nvinylsul fonylaminobenzene were diazotized at to 5 C. in 1000 parts by volume of water and 1500 parts by volume of 2 N-hydrochloric acid with 200 parts by volume of 5 N- sodium nitrite solution and subsequently a pH-value of 5 to 6 was adpusted by strewing in sodium bicarbonate. 361 parts of 1-acetylamino-8-hydroxynaphthalene-3,6-disulfonic acid were dissolved in 1500 parts by volume of water, neutralized with sodium hydroxide solution and coupled with the solution of the diazonium salt. The mixture was stirred at C. and a pH-value of 4 to 6.5 was maintained by the addition of soid m bicarbonate until the coupling was complete. The dyestuff obtained was salted out with sodium chloride, suctionfiltered and dried.

99 parts (of 65% strength calculated on the sodium salt) of the o.o'-dihydroxyaZo-dyestulf obtained were dissolved in 1000 parts by volume of water. Subsequently 26 parts of crystallized copper sulfate and 34 parts of crystallized sodium acetate were added and the mixture was heated to 60 to 65 C. until the reaction was complete. The dyestuff containing copper was isolated by evaporating the mixture at C. It was a black powder which, when printed on cotton in the presence of sodium bicarbonate yielded a violet tint possessing very good properties of wet fastness.

EXAMPLE 2 99 parts (of 65% strength calculated on the sodium salt) of the o.o'-dihydroxyazo-dyestuff free from metal described in Example 1 were dissolved in 1000 parts by volume of water. To the solution 26 parts of chrome alum and 28 parts of crystallized sodium acetate were added and the mixture was boiled under reflux or heated to 125 C. in a closed vessel until the formation of the complex chromium dyestuff was complete. After drying by atomization a dark blue powder was obtained. The dyestutf dyed cellulose fibers in the presence of an acidbinding agent grey blue tints possessing good to very good properties of wet fastness and a very good fastness to light.

EXAMPLE 3 90 parts (of 79.5% strength calculated on the potassium salt) of the mouoazo-dyestuff obtainable by coupling diazotized l hydroxy-2-amino-4-N-methyl-N-ethionylaminobenzene with l- (2-chloro-6-methyl-4-sulfophenyl -3- methyl-S-pyrazolone were dissolved at to C. in 800 parts by volume of water, stirred for 30 minutes with 24 parts of sodium hydroxide solution of 33% strength for the conversion into the vinyl compound and subsequently 13 parts of acetic acid were added. Then 26 parts of crystallized copper acetate were added and the temperature was maintained at 60 to 65 C. The reaction being complete the complex copper compound was precipitated by the addition of potassium chloride, suctioned off and dried.

The dyestufi obtained dyed cotton in the presence of sodium carbonate yellow brown tints possessing a very good fastness to light and to washing.

EXAMPLE 4 parts (of 79.5% strength calculated on the potas' sium salt) of the azo-dyestuff free from metal described in Example 3 were dissolved at 60 to 65 C. in 800 parts by volume of water, stirred for 30 minutes with 24 parts of sodium hydroxide solution of 33% strength for the conversion into the vinyl compound and 13 parts of acetic acid were added. Then 28 parts of crystallized sodium acetate and 14.5 parts of cobalt sulfate were added and the temperature was maintained at 60 to 65 C. until the formation of the complex dyestutf was complete. By the addition of potassium chloride the complex cobalt compound was precipitated, filtered off and dried. A brown dyestuff powder was obtained with which on cotton in the presence of sodium bicarbonate yellow 'brown prints possessing a good fastness to washing and a very good fastness to light can be prepared.

EXAMPLE 5 90 parts (of 79.5% strength calculated on the potassium salt) of the azo-dyestuff free from metal described in Example 3 were dissolved in 800 parts by volume of water. Then 28 parts of crystallized sodium acetate and 26 parts of chrome alum were added and the mixture was heated at the boil. It was boiled under reflux until the complex chromium compound had formed. After cooling to 40 to 50 C. the solution was rendered alkaline with sodium hydroxide solution and after the formation of the vinylsulfonamide compound neutralized with hydrochloric acid. Subsequently the dyestuii was salted out, filtered off and dried. The dyestuff was a brown powder which, when printed on cotton in the presence of sodium carbonate, yielded red brown prints possessing a good to vely good fastness to light and to wet processing.

EXAMPLE 6 A solution of 228 parts of 1-hydroxy-2-amino-4-N- methyl-N-vinylsulfonylaminobenzene were diazotized at to 5 C., in 1000 parts by volume of water and 1500 parts by volume of Z-N-hydrochloric acid by the addition of 200 parts by volume of 5 N-sodium nitrite solution. The nitrite in excess was removed with amidosulfonic acid. Into the diazonium salt solution adjusted to a pH value of 5 to 6 a neutralized solution of 188 parts of l,3-diaminobenzene-4-sulfonic acid in 1500 parts by volume of water was rapidly introduced. The mixture was stirred at 40 to 45 C. until coupling was complete and, by the addition of sodium bicarbonate, a pH-value of 4 to 6 was maintained. The dyestutf was precipitated with sodium chloride, filtered off and dried in vacuo at 50 C.

90 parts (of 50% strength calculated on the sodium salt) of the o-hydroXy-o'-aminoazo-dyestuif obtained were dissolved at 60 to 65 C. in 800 parts by volume of water. Then 28 parts of crystallized sodium acetate and 14.5 parts of cobalt sulfate were added and the mixture was stirred at 60 to 65 until the starting dyestuff could no more be detected. Subsequently the mixture was cooled and potassium chloride was added. The precipitated complex cobalt compound was isolated by filtration and drying. A dark dyestufi powder was obtained which dissolved readily in water to give a brown solution and yielded according to the process described in Example 11(d) a brown cotton print possessing a very good fastness to light and to washing.

EXAMPLE 7 47.9 parts of monoazo-dyestuff obtainable by coupling diazotized l methoxy-Z-aminobenzene-4-sulfonic acid with 1,3-diamino-4-N-methyl-N-vinylsulfonylaminobenzene were dissolved at 85 to 98 C. in 980 parts by volume of water. Subsequently 19 parts of crystallized sodium acetate and 17 parts of cobalt sulfate were added and the temperature was maintained at 85 to 98 C. until the formation of the metal complex was complete. For isolating the complex cobalt compound the dyestuff solution was evaporated to dryness in vacuo at 40 to 50 C. A dark brown powder was obtained which yielded on cotton in the presence of sodium carbonate brown prints and dyeings possessing very good properties of wet fastness.

EXAMPLE 8 84 parts of the monoazo-dyestuff obtainable by coupling diazotized l-ethoxy-2-amino-4-N-methyl-N-ethionylaminobenzene with l-acetylamino 8 hydroxynaphthalene-3,6-disulfonic acid were dissolved in 500 parts by volume of water. Then 30 parts of tartaric acid and 25 parts of crystallized copper sulfate were added and the mixture was maintained at a pH-value of 7.0 to 7.5 by the addition of sodium hydroxide solution and at a temperature of to C. The reaction being complete the complex copper dyestuif was isolated by salting out with potassium chloride and suction-filtering. The product obtained was identical with the dyestufi described in Example 1.

Dyeings possessing the same good properties of wet fastness were obtained by using for the preparation of the o-hydroxy-o'-alkoxyazo-dyestutfs the compound of the following formula instead of 1-ethoxy-2-amino-4-N-methyl-N-ethionylaminobenzene.

EXAMPLE 9 63.6 parts of the monoazo-dyestuff obtainable by coupling in an alkaline medium diazotized 1-hydroxy-2- amino-4-N-methyl-N-ethionylaminobenzene with l-hydroxy-6-(3'-carboxy-phenyl) amino naphthalene-IS-sulfonic acid, were dissolved at 85 to 90 C. in 1500 parts by volume of water. For the conversion into the complex chromium compound 22 parts of crystallized sodium acetate, 27.5 parts of chrome alum and 3.5 parts of sodium carbonate were added in order to adjust the pH- value to 4.5 to 5 and the temperature was maintained at 85 to 90 C. The 1:2-chromium complex being formed, the dyestutI was isolated by drying by atomization. It was a dark powder which was readily soluble in water and dyed cellulose fibers in the presence of sodium hydroxide according to the process described in Example 11 (a to 0) marine blue tints possessing a very good fastness to wet processing and to light.

EXAMPLE 10 34.8 parts of the potassium salt of 1-amino-4-N-methyl- N-ethionylaminobenzene were introduced into a mixture of 125 parts by volume of 2 N-hydrochloric acid and 200 parts of ice powder and diazotized with 20 parts by volume of 5 N-sodium nitrite solution. The diazonium salt solution was then introduced into a solution of 15.9 parts of 1-amino-7-hydroxynaphthalene in 115 parts by volume of ice water and 40 parts by volume of 2 N-hydrochloric acid. To the coupling mixture 40 parts by volume of a sodium hydroxide solution of 25% strength were added and the whole was stirred until coupling was complete. The precipitated dyestulr was filtered off, afterwashed with ice-cold Water and then introduced while stirring into 500 parts by volume of water.

To the dyestuff solution a diazonium salt solution was added which had been prepared from 13.45 parts of 2-aminophenol-4,6-disulfonic acid, 75 parts by volume of 2 N-hydrochloric acid, parts of ice powder and 10 parts by volume of 5 N-sodium nitrite solution. By adding sodium carbonate the coupling mixture was maintained at a pH-value of 6.8 to 7. The coupling being complete 12.5 parts of crystallized copper sulfate were added to the mixture which was after-stirred until the formation of the complex was complete. The dyestff solution was then adjusted with dilute sodium hydroxide solution to a pH-value between 9.0 and 9.5, stirred for some time, weakly acidified with hydrochloric acid, filtered and evaporated to drynes at a pH-value of 5 and at a temperature of 50 to 60 C.

A dark brown powder was obtained which was readily soluble in water and yielded on cellulose fibers in the presence of sodium bicarbonate brown dyeings or prints possessing a good fastness to light and very good properties of wet fastness.

7 EXAMPLE 11 39.2 parts of the potassium salt of the monoazo-dyestuff obtainable by coupling diazotized 6-chloro-2-aminophenol-4-sulfonic acid with 2-N-methyl-N-vinylsulfonylaminO-S-hydr OXy-naphthalene-6-sulfonic acid were dissolved in 500 parts by volume of water. After the addition of 40 parts of crystallized sodium acetate and 16 parts of copper sulfate the mixture was stirred at 70 to 75 C. until the formation of the copper complex was complete. The dyestulf was subsequently salted out with potassium chloride, suction-filtered and dried in vacuo at 40 C.

(a) 20 parts of the complex copper dyestuif and parts of sodium hydroxide were dissolved in 1000 parts by volume of water. Cotton fabric was impregnated with this dyestuff solution at C. and subsequently squeezed off to an increase in weight of 80%. The material was rolled on a roller, Wrapped in a foil and left on the roller for about 16 hours at 18 to C. while turning the latter. The material was then acidified, rinsed in boiling water and dried.

A claret dyeing possessing a very good fastness to light and to washing was obtained.

(b) parts of viscose rayon fabric were treated for 1 hour at 20 C. while well agitating with 1000 parts by volume of a liquor containing 2.5 parts of the complex copper dyestuff, parts of sodium sulfate and 10 parts of sodium hydroxide. Subsequently the dyeing was rinsed at the boil and dried. The claret dyeing obtained was distinguished by a very good fastness to light and to washing.

(c) 100 parts of cottton fabric were impregnated with an aqueous solution of 3% strength of the complex cop-per dyestuff and squeezed off to an increase in weight of about The material thus impregnated was dried, padded with a solution containing per liter of water 250 grams of sodium chloride and 10 grams of sodium hydroxide and squeezed off again until the weight was 200 parts. Subsequently the material was steamed for 30 seconds at to 102 C.. rinsed in water and dried.

A claret dyeing possessing a very good fastness to light and to washing was obtained.

((1) A printing paste Was prepared by mixing 20 parts of the complex copper dyestuff, 50 parts of urea, 400 parts of an aqueous sodium alginate solution of 5% strength, 500 parts of water and 20 parts of sodium carbonate. With the aid of rollers the printing paste thus obtained was applied to a cotton fabric and after drying steamed for 5 minutes at 101 to 103 C. The fabric was rinsed in water, boiled for 5 minutes in a dilute soap solution, rinsed again in water and dried. A claret print possessing a very good fastness to washing was obtained.

The following table indicates a number of further metalliferous azo-dyestuffs obtainable according to the present invention and the tints of the dyeings or prints obtained with these dyestuffs on cellulose fibers in the presence of an acid-binding agent.

Diazo component Coupling component Metal Tint 1 l-hydrory-2-amino-4-N-n1ethyl-N-vinyl- 2-hydroxynaphthalene-3,6-disulionic acid.. Cu Claret.

sultonylaminobenzene. 2 ..do l-benzoylamino-S-hydroxynaphthalene- Cu Violet.

4,6-disu1fonic acid. 3 do 2-rnethylaminonaphthalene-T-sulfonic acid Co Grey. 4 ..do l-acetylamino-B-hydroxynaphthalene4,6- Cu Violet.

disulfonic acid.

r ue grey; Cu Claret. 2-aminonaphthalene-6-sulionic acid Co Red brown. 1-hydroxy-3arninobenzene-G-sulionic acid Co Black brown. 2-acetylamino-S-hydroxynaphtahIene-(S- Cu Red violet.

sulfonic acid. 11 1-methoxy-2-arnino-4-N-methyl-N-vinyll-acetylarninoB-hydroxynaphthalene-3,6- Cu Violet.

sulfonylarninobenzene. disulfonic acid. 12 Ltgnino-3-N-n-butyl-N-vinylsulionylaminol-hydroxynaphthalene-i-sulfonic acid Cu Claret.

enzene. 13 l-hydr0xy-2-amino-5-N-methyl-N-vinyll-hydroxynaphthalene-5-sulfonie acid...... Cu Do.

sulfonylaminobenzene.

2-hydroxynaphthalene8-sulfonic acid Cu Red brown. G-aeetylamino-l-hydroxynaphthalene-3- Cu Claret.

sulfonic acid. 16 do 1-hydroxynaphthalene-B-sulfonic acid Cu Do. do. 2-hydroxynaphthalene-(i,8-disulfonic acid.. Cu Brown. 18 do 1-acetylamino-8-hydroxynaphthalene-IS,6- Cu Violet.

disulfonic acid. 19 ..do 1-phenyl-5-pyrazolone-3-carboxylic acid.... Cu Yelllw brown. 20 l-hyldroxy-2-arniiio-4-N-rnethyl-N-vin ylsu ony ammo enzene. 1-3.1'I1iJ104'N-In9tl'lyl-N-V inylsulfonylg' g naphtha1ene'3fidmmmmc Cu Blue.

amino-benzene. 21 2-3131lIlODllGIlOl-l-SlllfODlC acid 2-N-n1cthyLN-vinyl-sulfonylamino-S- Cu Ruby.

hydroxynaphthalene-6-sulfonic acid. 22 ..do .-do....-......... Co Claret. 23.. Cr Violet. 24.. Cu Red violet 25.. Cu Violet. 26.. 4-nitro 2-an1inophcnol-G-sulfonic acid. Cu Claret. 27.. G-nitro-2-aminophenoM-sulfonic acid.. Cu Red violet. 28.. 2-aminobenzoic acid Cu Red brown. 29.. 2-aminophenol-4-sulfonic a lionylarn no Cu Ruby.

hydroxynaphthalene-7-sulionic acid. 30 4-chloro-2-aminophenol-G-sulionic acid.. do On Bed violet. 31 2-aminopheno14-sulfonic acid..-- 1-(4-N-methyl-N-vinylsulfonylamino- Cu Yellow brown.

phenyl)-3-rnethyl-5 pyrazolone. 32 l-aininoi-N-cyc1o-hexyl-N-vinylsulfonyl- 1-aeetylarnino-8-hydroxynaphthalene3,6- Cu Violet.

aminobenzene. disulfonic acid. 33 l-hydroxy-2-an1ino-4-N-1nethyl-N-vinyL 1-(4-fl-hydroxyethyl sulfone-suliuric acid Ni Yellowish brown.

sulfonyl-aminobenzene. ester-phenyl)-3-methyl s-pyrazolone. 34 4-chloro-2-amino-1-hydroxybcnzenc-6 Secondary condensation product of cya- Cu Violet.

sulfonic acid. nuric chloride- 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid and 4-amin0- 1-N-methyl-N-vinylsulionylaminobenzene. 35..-...... 6-nitro-2-aminol-hydroxybenzcne-4- Secondary condensation product of cya- Cu Red violet.

sulfonic acid. nun'c chloride, 1-amino-8-hydroxynaphthalene-3,6-disulionic acid and 4- amino-LNqnethyl-N-vinylsulfonylamino-benzene. 36 4-acetamino-2-an1inophenol-G-sulionic 2-N-butyl-N-vinyl-sulfonylamino-8- Cu Violet.

ac' hydroxy-naphthalene-fi-sulfonic acld. 37 l-amino-Q-hydroxy-naphthalenct-sulionic 1-acetoacetylamino-4-N-n1ethyLN- Cr Red brown.

acid.

ethionylaniinobenzenc.

3,417,074 9 10 We claim: 5. The complex copper compound of the azo-dyestuff 1. The complex copper compound of the azo-dyestuff having the formula having the formula S0311 10 2. The complex copper compound of the azo-dyest-uff having the formula OH OH om 6. The complex copper compound of the azo-dyestufi havlng the formula HOaS COOH

OH SOaH 3. The complex copper compound of the azodyestuff NZNT TNTSOFCHZCm having the formula HO3s HO S s0 References Cited UNITED STATES PATENTS CHFCIPSOT'N 3,007,762 11/1961 Wegmann et a1. 260-151X 41H; 3,135,730 6/1964 Heyna et al. 260-147 4. The complex cobalt compound of the azo-dyestuff 3,197,456 7/ 1965 Kuhn: et

having the formula FOREIGN PATENTS f 214,547 4/1961 Austria.

CHAIRLES B. PARKER, Primary Examiner.

D. M. PAPUGA, Assistant Examiner.

2 1 us. 01. X1R.

CH f S0311 260 -149,147,146,37,206,19s,199,163,196,200,153,

on; 310, s; s 42, 54.2, 51 

